New kitty switching from Humulin needs starting dose help

[Carl & Polly & Bob (GA)]

http://felinediabetes.com/FDMB/viewtopic.php?f=28&t=74668
Currently on Humulin, 1.5u TID, plans to switch on Thursday and needs advice on starting dose. I asked that she post here, but just in case that doesn't happen, can somebody chime in?

Thanks!
Carl